@misc{indiciae54826458e836,
  title = {Preliminary map of historic margins of marshland, San Francisco Bay, California},
  author = {D.R. Nichols and N. A. Wright},
  year = {1971},
  doi = {10.3133/ofr71216},
  url = {https://pubs.usgs.gov/publication/ofr71216},
  note = {Source identifier: ofr71216}
}